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AC-Chukwuocha, Ngozi Blessing
ABSTRACT
Otamiri watershed in Owerri, South East Nigeria is an urban watershed that is faced with
serious ecological stresses due to intense land-use conversion. Siltation of the river,
threatening gully erosion and devastating flooding are some of the consequences of this landuse
and land cover change. This paper analyses the dynamics of land use changes in Otamiri
watershed using the technologies of Remote Sensing and GIS. Datasets were obtained from
classified Aerial photographs of 1977, IKONOS satellite image of 2006 and 2012 Google
Earth satellite image. Images were resampled and registered to Universal Transverse
Mercator, zone 32. Post-classification change detection was employed, using vector data
structure model.
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